Wrench.



O. P. OASE.

WRENCH.

APPLICATION FILED APRA, 1913.

Patented Dec. 9, 1913.

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H n me. H N5 .M :ha 0 WC m P. r my 8 O W/T/VESSES If STATES PATENT OFFICE.

OMER PITTS CASE, OF CANANIDAIGUA, NEW YORK, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO CASE WRENCH COMPANY, INC.

WRENCH.

To all whom t may concern Be it known that I, OMER P. CASE, a citizen of the United States, and a resident of Canandaigua, in the county of Ontario and State of New York, have invented a new and Improved Wrench, of which the following is a full, clear, and exact description.

My invention is particularly adapted for embodiment in monkey wrenches, and relates especially to novel means for holding the movable jaw of the wrench in adjusted position relatively to the fixed jaw.

The invention will be particularly explained in the specic description following.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in both views.

Figure 1 is a sectional side elevation of a wrench embodying my invention; and Fig. 2 is a cross section on the line 2--2 of Fig. 1.

In constructing a practical embodiment of my invention as illustrated, the shank 10 of the fixed jaw 11 has slidably arranged thereon a movable jaw 12. The latter is recessed, as at 13, to receive the shank 10, and may have a removable side 12 for convenience in assembling the parts. The movable `jaw 12 has a lateral recess 111 complementary to the main recess 13, and walls or shoulders 15, 16, define the front and back of the recess 141. A key 17 is arranged to slide on the shank 10 and extends between a face of the said shank and an inner wall of the movable jaw, and between the key and movable j aw is a clutch roller 1S. The key 17 presents walls or shoulders 19, 20, at front and back and its forward movement is limited by the shoulder 15 of the movable jaw, while the clutch roller has movement between the shoulder 19 of the key and the rear wall or shoulder 16 of the movable jaw, and thus the said shoulder 16 limits the rearward movement of the clutch roller and the key. The rear end of the key 17 lies outside the movable jaw and is formed into a suitable handle 21 for its convenient manipulation. A spring 22 is so arranged as to normally tend to force the key 17 inward, said spring being secured to the movable j avv by a clamp screw 23 or its equivalent, and having its free end bearing against a Specification of Letters Patent.

Application filed Apr14, 1913.

Patented Dec. 9,1913.

serial No. 758,812.

rear shoulder 2i of the key, at the base of the handle 21.

By the described construction the spring in pressing the key forward causes the roller 1S to bind between the key and the opposed surface of the movable jaw and press the inner face of the key into binding frictional engagement with the shank 10. To adjust the position of the movable jaw relatively to the fixed jaw, the key is withdrawn against the tension of the spring 22 by the user taking hold of the handle 21, thereby moving the roller 18 rearwardly. Upon a release of the handle 21, the spring 22 causes the clutch roller to bind the parts in the adjusted position on the wrench.

Having thus described my invention, I claim as new, and desired to secure by Letters Patent:

1. A wrench, comprising a shank having a fixed jaw, a movable jaw slidable on said shank, a key slidable on the shank and relatively to the movable jaw and extending between the side of the shank and the opposite inner surface on the movable jaw, and a clutch roller between the key and the movable jaw, one of which presents an inclined surface to the clutch roller, the face of the key opposite the clutch roller being adapted to bind on the shank.

2. A. wrench, comprising a shank having a fixed jaw, a movable `jaw sliding on the shank, a key slidable on the shank and relatively to the movable j aw and extending between a side 0f the shank and an opposed inner surface on the movable jaw, a clutch roller arranged between opposed surfaces on the key and movable jaw, one of which surfaces is inclined to the other, the face of the key opposite the clutch roller being parallel with the shank and adapted to bind thereon, and a spring secured to the movable jaw and exerting a forward pressure on the key, said key, outside the movable jaw and at its rear end, having a handle.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

OMER .PITTS CASE.

Witnesses:

HARRISON B. FERGUSON, I-IAZEL E. PRUNER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents.

Washington, D. G." 

